debug.c

   1 /*
   2  * Copyright 2004-2005 Timo Hirvonen
   3  */
   4
   5 #include "debug.h"
   6 #include "prog.h"
   7
   8 #include <stdio.h>
   9 #include <stdarg.h>
  10
  11 #if DEBUG > 1
  12 static FILE *debug_stream = NULL;
  13 #endif
  14
  15 void debug_init(void)
  16 {
  17 #if DEBUG > 1
  18         char filename[512];
  19         const char *tmp = getenv("TMPDIR");
  20
  21         if (!tmp || !tmp[0])
  22                 tmp = "/tmp";
  23
  24         snprintf(filename, sizeof(filename), "%s/cmus-debug", tmp);
  25         debug_stream = fopen(filename, "w");
  26         if (debug_stream == NULL)
  27                 die_errno("error opening `%s' for writing", filename);
  28 #endif
  29 }
  30
  31 /* This function must be defined even if debugging is disabled in the program
  32  * because debugging might still be enabled in some plugin.
  33  */
  34 void __debug_bug(const char *function, const char *fmt, ...)
  35 {
  36         const char *format = "\n%s: BUG: ";
  37         va_list ap;
  38
  39         /* debug_stream exists only if debugging is enabled */
  40 #if DEBUG > 1
  41         fprintf(debug_stream, format, function);
  42         va_start(ap, fmt);
  43         vfprintf(debug_stream, fmt, ap);
  44         va_end(ap);
  45 #endif
  46
  47         /* always print bug message to stderr */
  48         fprintf(stderr, format, function);
  49         va_start(ap, fmt);
  50         vfprintf(stderr, fmt, ap);
  51         va_end(ap);
  52         exit(127);
  53 }
  54
  55 void __debug_print(const char *function, const char *fmt, ...)
  56 {
  57 #if DEBUG > 1
  58         va_list ap;
  59
  60         fprintf(debug_stream, "%s: ", function);
  61         va_start(ap, fmt);
  62         vfprintf(debug_stream, fmt, ap);
  63         va_end(ap);
  64         fflush(debug_stream);
  65 #endif
  66 }